#! /usr/bin/python -E
# Authors: John Dennis <jdennis@redhat.com>
#
# Copyright (C) 2007  Red Hat
# see file 'COPYING' for use and warranty information
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; version 2 only
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#

import sys
import os
from optparse import OptionParser

import ipa.ipaclient as ipaclient
import ipa.ipautil as ipautil
import ipa.config
import ipa.ipaerror
import ipa.radius_util as radius_util

import xmlrpclib
import kerberos
import ldap

#------------------------------------------------------------------------------

radius_attrs = radius_util.radius_profile_attr_to_ldap_attr.keys()
radius_attr_to_ldap_attr = radius_util.radius_profile_attr_to_ldap_attr
ldap_attr_to_radius_attr = radius_util.radius_profile_ldap_attr_to_radius_attr
mandatory_radius_attrs = ['UID']
distinguished_attr = 'UID'

#------------------------------------------------------------------------------

def help_option_callback(option, opt_str, value, parser, *args, **kwargs):
    parser.print_help()
    print
    print "Valid interative attributes are:"
    print ipautil.format_list(radius_attrs, quote='"')
    print
    print "Required attributes are:"
    print ipautil.format_list(mandatory_radius_attrs, quote='"')
    sys.exit(0)

def main():
    pairs = {}

    opt_parser = OptionParser(add_help_option=False)

    opt_parser.add_option("-u", "--uid", dest="uid",
                      help="RADIUS profile identifier")
    opt_parser.add_option("-s", "--shared", dest="shared", default=False, action='store_true',
                      help="profile is shared")
    opt_parser.add_option("-d", "--Description", dest="desc", 
                      help="description of the RADIUS client")

    opt_parser.add_option("-h", "--help", action="callback", callback=help_option_callback,
                        help="detailed help information")
    opt_parser.add_option("-i", "--interactive", dest="interactive", action='store_true', default=False,
                      help="interactive mode, prompts with auto-completion")
    opt_parser.add_option("-p", "--pair", dest="pairs", action='append',
                      help="specify one or more attribute=value pair(s), value may be optionally quoted, pairs are delimited by whitespace")
    opt_parser.add_option("-f", "--file", dest="pair_file",
                      help="attribute=value pair(s) are read from file, value may be optionally quoted, pairs are delimited by whitespace. Reads from stdin if file is -")
    opt_parser.add_option("-v", "--verbose", dest="verbose", action='store_true',
                      help="print information")

    opt_parser.set_usage("Usage: %s [options] %s" % (distinguished_attr, os.path.basename(sys.argv[0])))

    ipa.config.add_standard_options(opt_parser)
    options, args = opt_parser.parse_args()

    if len(args) < 1:
        opt_parser.error('missing %s' % (distinguished_attr))

    ipa.config.init_config(options)

    uid = args[0]
    user_profile = not options.shared
    pairs[distinguished_attr] = uid

    # Per user profiles are pre-created (i.e. objectclass radiusprofile is always added for each user)
    if user_profile:
        print "ERROR, you cannot add a per-user radius profile, it pre-exists"
        return 1

    # Get pairs from a file or stdin
    if options.pair_file:
        try:
            av = ipautil.read_pairs_file(options.pair_file)
            pairs.update(av)
        except Exception, e:
            print "ERROR, could not read pairs (%s)" % (e)

    # Get pairs specified on the command line as a named argument
    if options.uid: pairs['UID'] = options.uid
    if options.desc: pairs['Description'] = options.desc

    # Get pairs specified on the command line as a pair argument
    if options.pairs:
        for p in options.pairs:
            av = ipautil.parse_key_value_pairs(p)
            pairs.update(av)

    # Get pairs interactively
    if options.interactive:
        # Prompt first for mandatory attributes which have not been previously specified
        prompted_mandatory_attrs = []
        existing_attrs = pairs.keys()
        for attr in mandatory_radius_attrs:
            if not attr in existing_attrs:
                prompted_mandatory_attrs.append(attr)

        c = ipautil.AttributeValueCompleter(radius_attrs, pairs)
        c.open()
        av = c.get_pairs("Enter: ", prompted_mandatory_attrs, radius_util.validate)
        pairs.update(av)
        c.close()

    # FIXME: validation should be moved to xmlrpc server

    # Data collection done, assure mandatory data has been specified

    if pairs.has_key(distinguished_attr) and pairs[distinguished_attr] != uid:
        print "ERROR, %s specified on command line (%s) does not match value found in pairs (%s)" % \
            (distinguished_attr, uid, pairs[distinguished_attr])
        return 1

    valid = True
    for attr in mandatory_radius_attrs:
        if not pairs.has_key(attr):
            valid = False
            print "ERROR, %s is mandatory, but has not been specified" % (attr)
    if not valid:
        return 1

    # Make sure each attribute is a member of the set of valid attributes
    valid = True
    for attr,value in pairs.items():
        if attr not in radius_attrs:
            valid = False
            print "ERROR, %s is not a valid attribute" % (attr)
    if not valid:
        print "Valid attributes are:"
        print ipautil.format_list(radius_attrs, quote='"')
        return 1

    # Makse sure each value is valid
    valid = True
    for attr,value in pairs.items():
        if not radius_util.validate(attr, value):
            valid = False
    if not valid:
        return 1

    # Dump what we've got so far
    if options.verbose:
        print "Pairs:"
        for attr,value in pairs.items():
            print "\t%s = %s" % (attr, value)

    radius_entity = radius_util.RadiusProfile()
    for attr,value in pairs.items():
        radius_entity.setValue(radius_attr_to_ldap_attr[attr], value)

    try:
        ipa_client = ipaclient.IPAClient()
        ipa_client.add_radius_profile(radius_entity)
        print "successfully added"
    except xmlrpclib.Fault, f:
        print f.faultString
        return 1
    except kerberos.GSSError, e:
        print "Could not initialize GSSAPI: %s/%s" % (e[0][0][0], e[0][1][0])
        return 1
    except xmlrpclib.ProtocolError, e:
        print "Unable to connect to IPA server: %s" % (e.errmsg)
        return 1
    except ipa.ipaerror.IPAError, e:
        print "%s" % (e.message)
        return 1

    return 0

if __name__ == "__main__":
    sys.exit(main())
